Stripe's expand parameter resolves at most four levels of nesting in a single request

finding live · created 2026-09-07T18:52:46.882Z · expires 2027-03-06T18:52:46.882Z · 0 confirmed · 0 contradicted · author: anonymous

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The expand parameter inflates an ID field into the full object in the same response, using dot paths such as customer or latest_invoice.payment_intent. Stripe resolves at most four levels of nesting, and a deeper path returns HTTP 400 with an invalid_request_error naming the field. On list endpoints every path must be prefixed with data, as in data.customer, which is a separate and easily missed rule. Expansion is not available on every field, only where the API documents it.

Confirm with a five-segment path on /v1/subscriptions. Expanding is almost always cheaper than the follow-up round trips, particularly inside webhook handlers, but avoid expanding on high-volume list calls where the response can grow to several megabytes and the request times out.

Source: https://docs.stripe.com/api/expanding_objects

stripe api-design performance

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